Design and context of use of postpartum haemorrhage kits in the UK: a qualitative study combining human factors and social science analysis.

Effective management of postpartum haemorrhage (PPH) - a leading cause of maternal mortality - depends on rapid access to critical equipment and medications. PPH emergency kits support timely care, but their design and practical use remain largely unexamined. We combined human factors and social science analysis - drawing on photographs, field observations, and 19 interviews with maternity professionals - to examine kit designs, usability, and contextual factors in six UK maternity units. Many design features, including kit format, item grouping, item visibility, and portability, varied substantially across units. Usability was shaped by factors including labour room and storage constraints, medication access, staff skill mix, and restocking procedures. Some designs risked delays or confusion in emergencies. While standardisation may improve kit safety and efficiency, rigid solutions could risk misalignment with local workflows. A modular approach combining standardised core components with adaptable elements, designed collaboratively with end-users and grounded in ergonomic principles may provide an effective solution.